Lamp.



R. H. WELLES.

LAMP.

APPLICATION FILED APR. 30, 1914.

1,170,378. Patented Feb. 1, 1916.

2 SHEETSSHEET i.

R. H. WELL-ES. LAM P.

AFPLICATFON FILED APRAO, I914. v I 1,170,378. Patented Feb. 1, 1.916;

2 SHEETS-SHEET 2.

UNITED TATES PATENT omen.

RICHARD H. -WELLES, OF KENOSHA, WISCONSIN, ASSIGNOR TO THE BADGER BRASSMFG. (10., F KENOSHA, WISCONSIN,- A CORPORATION OF WISCONSIN LAMP.

Specification of Letters Patent.

Patented Feb. 1, 1916.

. Application filed-April 30. 1914. Serial No. 835,356.

. To all whom it may concern:

-Kenosha. in the county of Kenosha and State of isconsin, have invented,certain new and useful Improvements -in Lamps, of which the following isa specification.

'My invention relates to improvements in lamps. and refers moreparticularly to electric head lamps used on automobiles an for otheroutdoor purposes,

The salient objects of the invention are,

to provide a construction in which the re-- flecting surface ismaintained at alltimes clean and bright by providing a gas-tight 'sealwhich prevents the access of impureair or' vapors to the polishedsurface of the reflector; to providea construction of the classdescribed in which the glazing of the lamp may be readily removed with aminimum amount of manipulation while at the same time securing a sealedgas-tight joint when thelamp is closed; to provide a construction of theclass described in which the lamp door carrying the glazing isresiliently clamped against the end of the lamp body, thus taking careof mechanical inaccuracies in constructing the various parts of thelamp; to provide a construction in which a single movement of the lampdoor both seals the casing and securely locks the door to the front ofthe lamp: to provide a construction in which a rotary movement of thelamp door results in a gradual increase in pressure upon the gas-tightseal asthe door advances into its closed position; to provide aconstruction in which resilient locking means are employed to preventthe accidental loosening up of the door and consequentleakage of thegas-tight seal; to provide a construction which will be simple andeconomical in construction, and, in general, to provide an improved lampof the character specified.

My invention consists in matters hereinafter described and moreparticularly pointed out in connection with the accompanying drawings,in which Figure 1 is a front elevation of 'a head lamp embodying myconstruction; Fig. 2 is a side elevation of F ig; 1; Fig. 3 is a frontelevation of the lamp shown in Fig. l, the glazing door being removed;Fig. 4 is an elevation of the door removed from the lamp shown in Fig.land looking through the glazing from the inside; Fig. 5 is afragmentary section taken along the. line 5-5 of Fig. 1; Fig. 6 is a.view similar to Fig. 5 but taken at a different point in thecircumference of the lamp so as toshow the looking means; Fig. 7 is apartial fragmentary section taken along the lines 77 of Figs. 3 and 6:Fig. 8 isa fragmentary elevation of a portion of Fig. 1 showingcertain'parts broken away in order to bring out the mechanicalconstruction of the locking .devices Fig. 9 is a section taken along theline 9-9 of Fig. 8, and Fig. 10 is a section through the-lockingbuttontaken along the line 10l0 of Fig. 8.

In a preferred embodiment of my eonstruction, illustrated in thedrawings, the lamp shown is an automobile head lamp comprising an outercasing 1, an inner reflector 2. the front end of which is inclosed by aglazing 3-supported in an annular removable door or frame at. Theelectric lamp 5 is seated in the focus of the reflector and projectingflange 8 formed integral with the reflector portion 2,- and betweenthese two flanges is interposed a sealing gasket 9 which is thus clampedbetween the two flanges by a plurality of boltsdistributed along thecircumference. These bolts comprise fillister head screws 10' which arethreaded into nuts 11 soldered .to.the under side of the inwardlyprojectingiflange 7. The removable door at consists of a ring thecross-section of which forms part of'a.

circle, and brazed or solderedto this ring is an annular part tionmember 12. The 111- ner portion of" the circular ring 4P1'0JBCtS beyondthe inner cylindrical portion 12 of the member 12, and there is thusformed an annular pocket, triangular in cross-section,

in which is seated the gasket 13. This gas ket 13 may be a rope cottonor other suitable material of a sutlicient diameter to form a seal andcushion for the glazing 3 which is clamped against it by means of aplurality of inwardly projecting clamps 14, these clamps being screwedto the member 12 by means of apluralit of fillister head screws 15 whichare threa ed into nuts 16 soldered to the inside of the member 12. Themember 12 is suitably die-formed so as to provide an inwardly turnedflange 17 which is of the proper diameter to engage the edge of thegasket J, previously referred to.

I will now described the means for resiliently clamping the door to thebody of the lamp. Distributed around the circumference. of the door andbody are a plurality of clamping devices, in this case four. each ofwhich comprises a am hook 18-which is riveted and soldered to thecylindrical portioir 12* of the part 1'2 of the door, and projectsthrough slots 19 punched in the flanges of the reflector and of theouter casing. The cam h'ookslS are constructed of comparatively heavymetal and are notched out at their inner ends to form cam surfaces 20suitably located to engage the plate springs 21. The plate springs 21are also slotted out in order to admit the ends of the locking hooks andare riveted and soldered at one of their ends to the under side of theflange 9 of the outer casing, the other end of the spring being leftfree so as to furnish the required resiliency.

In order to clamp the door to the casing, the hooks are inserted intothe slots by an axial inward movement of the door, and then, after thedoor has become properly seated in the body, the door is given a slightrotary movement in the direction of the arrow 22, shown in Fig. 7. Atthe commencement of this rotary movement the point 23 of each of thehooks slides below the end 2% of the slot in the freeend of the springwhich thus moves axially outward as the hook is rotated, and soresiliently presses the door and casing together. It will be noticedthat the clamping together of the door and the casing compresses thegasket 9 between the flange 7 and the annular flange 17 on the innerface of the door and thus seals the lamp against the admission of impureair or noxious vapors.

In order to prevent the loosening up of the door, due to the vibrationof the car, I employ a-subsidiary locking device. This comprises aspring-pressed plunger 25 which is so placed in the circumference of thedoor that it will occupy a position behind the fillister head of one ofthe screws 10 and thus prevent a backward rotary movement-of the door.The plunger 25 is mounted to slide in a tubular sleeve 26 radiallyseated in tllu annular door, and the outer end of the plunger 27 1sreduced in diameter so as to glve room for the coil compression spring28 interposed I between the outer closed end of the tubular sleeve 26and the shoulder of the plunger. The reduced portion 27 of the plungerextends outwardly through the bushing 29 at the outer end of the sleeve26, and is furnished with an ornamental head 30 screwed and rivetedthereto. The inner end of the head 30 is slotted out across its diameterso astoadmit an outwardly projecting rectangular portion 31 formedon'the end of the building 29 by milling ofi its two sides.

The operation of the locking devicev is obvious. In the position shown,the lamp is locked against rotary movement of the door. If the lamp isto be opened, the plunger is withdrawn outwardly a suflicieut distanceuntil the inner face of the button 30 passes beyond the end of theportion 3]., and then the button is given a-slight rotary movement toretain the plunger in unlocked position. The end of the plunger is thusdrawn out of range of the head ofthe nut 10 and the door can be rotatedand removed.

It is understood that my construction is capable of such modificationsas would be apparent to a mechanic skilled in the art, withoutdeparting. from the spirit of the invention, and, therefore, I do notwish tobe limited to the details described exceptas specified in theappended claims.

I claim v 1. In a lamp, the combination of a substantially bowl-shapedcasing, a parabolic reflector nested within said casing, said reflectorand casing being provided with an annular member connecting them rigidlyto gether, a door provided with a glazing closing the front end of thelamp body, a gasket interposed betweensaid door and said annularconnection, and means for forcing said door toward said annularconnection.

2. In a lamp, the combination of an outer shell provided with aninwardly projecting flange, an inner reflector shell provided with-anoutwardly projecting flange lapping the flange on the outer shell, anannular gasket supported in contact with the outer face of one of saidflanges, an annular glazing door having a glazing for closing the frontend of the reflector and provided with an annular surface adapted toengage the outer annular surface of said gasket, and. resilient meansfor clampiiig said door to the lamp.

' 3. In a lamp, the combination of an outer shell provided with aninwardly projecting flange, an inner reflector shell provided with anout 'ardly projecting flange overlappingthe flange .on the outer shell,an annular gasket interposed between said flanges and extending beyondsaid inner flange. an annular glazing door having a glazing for closingthe front end of the reflector and provided with a flange adapted toengage the projecting surface of said gasket. and resilient means forclamping said door to the lamp.

- 4. In a lamp. the combination of an outer shell provided with aninwardly projecting flange. an inner reflectorshell provided with anoutwardly projecting flange overlapping the flange on the outer .shell,an annular Tnula'r door having. a glazing for closing the,

gasket interposed between said flanges andv projecting from between saidflanges, an an- -front endof the reflector and provided with an annularseat adapted to engage the projecting surface of said gasket, and meansfor pressing the door against said gasket;

5'. In a lamp; the combination of anouter shell, a parabolic reflectornestedwithin said outer shell'and provided with an outwardly extendingflange connecting it to said outer shell, said flange being providedwith a'circumferentially, extending slot,- a spring on. 4 4 the insideof said flange and a hook carried 7 by .the door adapted to' enter asaid slot and engage saidspring and provided with a circumferentially"sloping" cam surface adapted to,:.compress said spring by a "re.-

tary movement of saidjdoor,

6. In a lamp, the combination of a body portion having an annular gasketseat, a door havmg an annular seat adapted to com-l press a gasketbetween said door and body,

sai'd door being. adapted to clamp into on.- gagement with said body bya Ieircnmferential movement thereof, and a springpressed plunger carriedby one of 'said'mem bers" and adapted to engage a projection on theother of said members I RICHARD H. .WELLEs'.

Witnesses: i I J. W. SCHMITT,

HENRY E. Hnnzoe.

